07MnNiMoVDR steel plate grade indication and 07MnNiMoVDR steel plate implementation standard

07MnNiMoVDR steel plate grade indication and 07MnNiMoVDR steel plate implementation standard

1. Introduction to
07MnNiMoVDR steel plate 1. 07MnNiMoVDR steel plate is a quenched and tempered high-strength steel, which has low welding cold crack sensitivity and good low-temperature toughness.
2. The grade of 07MnNiMoVDR steel plate represents: "07": it represents the carbon content of the steel plate; "MnNiMoV": indicates that the steel plate contains manganese, nickel, molybdenum, vanadium and other chemical elements; "DR": indicates the pinyin initial of "low capacity" of the cryogenic container plate.
3. 07MnNiMoVDR steel plate implementation standard: implementation standard Q/WTB22-2006. 4. 07MnNiMoVDR steel plate size, shape, weight and allowable deviation: The size, shape and allowable deviation of the steel plate shall comply with the provisions of GB/T709.
5. 07MnNiMoVDR steel plate delivery status: the steel plate is delivered in the quenched and tempered state of quenching + tempering, and the delivery status can also be specified according to the technical requirements.
6. 07MnNiMoVDR steel plate thickness direction performance requirements: Z15, Z25, Z35.
7. 07MnNiMoVDR steel plate flaw detection requirements: one probe, two probe, three probe.
8. 07MnNiMoVDR steel plate density: 7.85/cubic meter.
9. 07MnNiMoVDR steel plate weight adjustment formula: thickness * width * length * density.
10. Conventional size of 07MnNiMoVDR steel plate: 8-120mm*2000-2500mm*8000-12000mm

chemical composition
 
C    Si    Mn    P    S    Cr    Ni
≤0.09    ≤0.15-0.40    ≤1.20-1.60    ≤0.012    ≤0.005    ≤0.30    0.20-0.50
Note:
(1): In order to improve the properties of steel, other trace alloying elements other than the above table can be added, and the data comes from the network and is for reference only.
(2): The allowable deviation of the chemical composition of the finished steel plate shall comply with the provisions of GB/T222

07MnNiMoVDR steel plate mechanical properties: Grade: 07MnNiMoVDR
tensile strength σb (MPa): ≥610-730 yield strength σs (MPa): ≥490 elongation δ5 (%): ≥17
temperature °C: -40 °C
180

° cold bending:
d=3a
Impact energy Akv (J): ≥100J 07MnNiMoVDR Steel Plate Features
1,
07MnNiMo VDR has good strength and toughness, good welding performance, good internal quality, good HIC and hydrogen sulfide corrosion resistance, and meets the requirements of low welding crack susceptibility.
2. 07MnNiMoVDR quenching and tempering high strength adopts a number of new processes and technologies, such as multi-micro alloying treatment, molten steel vacuum treatment, inclusion denaturation treatment, and rolling and controlled cooling of steel plate under low speed and high pressure. On the basis of ensuring that the steel has high purity, high strength, high toughness and good welding performance, the base metal is reasonably quenched and tempered before welding to meet the requirements of low welding crack sensitivity.
07MnNiMoVDR steel plate production and cutting process: production process: primary refining → LF refining→ VD treatment→ continuous casting (die cast→ing), cleaning, heating→ rolling → (stacking→), surface inspection→ batch → flaw detection→ heat treatment→ cutting and sampling→ performance inspection → warehousing.
Cutting process: 07MnNiMoVDR steel plate factory inspection of the performance indicators meet the requirements in accordance with the cutting process, can be cut processing and drawing blanking, the general thickness of the steel plate is not more than 20mm, the preferred choice of CNC plasma cutting or CNC laser cutting, if the thickness of the steel plate is greater than 30mm, usually CNC flame cutting will be selected, you can control the cutting accuracy and time